The potential for terrorism is a problem that is easily solvable, especially when compared with the challenge of building a sub-orbital aircraft (which basicall

The potential for terrorism is a problem that is easily solvable, especially when compared with the challenge of building a sub-orbital aircraft (which basically accelerates to almost orbital velocity before reentering as if from orbit). But the author's points about competition from subsonic high-end flights, as well as the potential for high fidelity video conference systems of the future to compete, are more compelling.